Compose pipe data model

 

Function ready condition: All '(R)equired'-input data tables tested

Function error condition: 14 error conditions, 15 warning conditions, 4 messages

Errors:

E310/1:

Dia/wall thickness ratio ≤ 2

Diameter/wall thickness ratio is less than or equal to 2.

output table PIPEDIM will become questioned

E310/2:

Bendradius/dout ratio less than 0.5

Bend radius / outer diameter ratio is less than 0.5.

output table PIPEDIM will become questioned

E310/3:

Material name 'name' not found

The material reference name specified in input table MATL has not been specified in input table ISTROP or ANTROP.

output table PIPEMAT will become questioned with the relevant reference name marked by [Error!]

output table PIPEDIM has not been produced

E310/4:

COR-AL > 50% of T-NOM

The corrosion allowance exceeds half of the nominal wall thickness.

output tables will be produced

output table PIPEDIM will become questioned

E310/5:

Material 'name' found more than once

A material reference name specified in input table MATL has been specified in both input table ISTROP and ANTROP.

output table PIPEMAT will become questioned with the relevant reference name marked by [Error!]

output table PIPEDIM has not been produced

E310/6:

'name' from TEECONF missing in TEESPEC

The Tee reference name in table TEESPEC does not occur in table TEECONF.

no output tables have been produced except T-SDATA which has been questioned.

E310/7:

Water level not defined

In table DEADW in column WLEVEL the specification YES exists and input table W-LEVEL does not exist.

output tables PIPEMAT and PIPEDIM have been produced

(The water level is required to be able to distinguish between submerged and above water pipeline sections.)

E310/8:

Anisotropic material in code not allowed

An anisotropic material has been specified and applied while the Analysis Type has been set to 'NEN 3650', 'ASME B31.8' or 'Belgian Law'.

output table PIPEMAT will become questioned

output table PIPEDIM has not been produced

(The above analysis types are not valid for pipelines made from anisotropic material.))

E310/9:

L-BRN ≤ 0.5*D-RUN of tee 'name'

The length of the branch of a tee is not realistic with respect to the diameter of the run.

output tables PIPEMAT and T-SDATA have been produced

output table PIPEDIM has not been produced

E310/10:

L-RUN ≤ 0.5*D-BRN of tee 'name'

The length of the run of a tee is not realistic with respect to the diameter of the branch.

output tables PIPEMAT and T-SDATA have been produced

output table PIPEDIM has not been produced

 

E310/11:

WLEVEL specified as both Yes and No

Either Deadw1 and Deadw2 are considered to be a jump in the deadweight, or as the deadweight under and above water. A combination of both is not allowed.

E310/12:

SIS‘id’ inner pipe does not fit outer pipe

The outer diameter of the inner pipe is equal or larger than the inner diameter of the outer pipe for the specified SIS section. The pipes physically do not fit into each other. Per outer pipe element the accompanying inner pipe element is checked.

E310/13:

Tee 'teeref' D-BRN greater than D-RUN

Diameter of the tee branch cannot be greater than the tee run diameter.

E310/14:

Mitre bend 'ident' crotch 'value'<0

The crotch C of the mitre bend is smaller than 0, which is not allowed.

E31014

Warnings:

W310/1:

Small diameter/wall thickness ratio

Small diameter/wall thickness ratio occurs, the D/t ratio is smaller than 20.

output tables will be produced

(See table 'Pipe dimension data'  [PIPEDIM].)

W310/2:

Bendpar in table PIPEDIM less than 0.2

Bend parameter does not meet value criterion.

output tables will be produced

(The bendpar value should not be less than 0.2 (for explanation see table PIPEDIM or function CALPIPE).)

W310/3:

Extreme syield/young ratio

Extreme σyield / Young modulus ratio occurs.

output tables will be produced

(Ratio exceeds 1 or is less than .0001.)

W310/4:

Wallth. too small for specified code

The wall thickness specified does not meet the minimum wall thickness criteria of the Code specified in the Analysis Type.

output tables will be produced

(With the NEN3650 code: If the wall thickness meets the group II criteria, but not the group I criteria, message M310/4 is also generated.)

W310/5:

Diam pipes adjacent to 'title' unequal - or - wall pipes adjacent to 'title' unequal

The diameter or wall thickness of the matching pipe is different for the run elements of a Tee.

output tables will be produced

('title'= CONNAME from input table CONNECT and output table T-CDATA. when calculating the stress intensification factors, the highest values are applied.)

W310/6:

Wall for tee 'title' < wall adj. elem

The wall thickness specified for a tee element is less than the wall thickness of the adjacent (matching) pipe element.

output tables will be produced

('title'= CONNAME from input table CONNECT and output table T-CDATA.)

W310/7:

Nu-XF + Nu-FX > 1.0

The Poisson's ratio's of anisotropic material has been specified such that the sum exceeds 1.

output tables will be produced

(Theoretically the sum of the Poisson's ratio's cannot exceed 1, however, this may be slightly the case for the values measured by the manufacturers.)

W310/8:

Large tolerances elem. 'num'-'num'.

Wall thickness tolerance is large compared to wall thickness itself.

(Tolerance is more than 50% of wall thickness.)

W310/9:

Wall Welded-On tee 'title' > adj. elem

The wall thickness of the run of the welded-on tee named 'title' is larger than the wall thickness of the adjacent element(s) / matching pipe(s). With this type of tee, the wall thickness of the run should be identical to that of the matching pipe(s).

output tables will be produced

('title'= CONNAME from input table CONNECT and output table T-CDATA.)

W310/10:

Extreme diameter/wall thickness ratio

Extreme diameter/wall thickness ratio occurs, the D/t ratio is smaller than 5 or larger than 200.

output tables will be produced

(See table 'Pipe dimension data'  [PIPEDIM]. Note that design function 6 cannot be calculated with ratios smaller than 5)

W310/11:

Mitre bend 'ident' l-segm not accurate

For a single kink mitre bend L-SEGM in table POLYDIF should be calculated as close as feasible  to 2 x L1 (as shown below) in order to get the correct bend tangent points. The value of L1 is reported in table BENDFAC, but can also be calculated using the formula.

BENDFAC

W310/12:

Mitre bend 'ident' radius too small

Bend radius R should not be less than 2.5 r

W31012

With a ratio (far) less than 2.5 the theory applied is inappropriate.

W310/13:

Mitre bend 'ident' crotch too small

The crotch C should not be less than Do

W31013

W310/14:

Antrop mat. is calculated as mat. linear

Anisotropic materials are always calculated material linear.

output tables will be produced

 

W310/15:

Mitre 'ident' cant calc as antrop mat.

Mitre bend cannot be calculated as anisotropic material.

output tables will be produced

 

W310/16:

Tee 'title' length branch > diameter run

Most of the fabricated tees have a branch length varying from 0.7 to 1.0 times the run diameter.  For a larger branch length the stress results in the branch element become too favourable due to the applied tee behaviour modeling.

(‘title’ is the reference name of tee TEE-REF from input tables TEECONF and TEESPEC)

Messages:

M310/1:

Diameter/wall thickness of tees changed

The wall thickness or diameter specified in table TEESPEC is different from the values for the pipe section in table WALL and DIAM.

output tables will be produced

(This message is given because the differences may not be intended and the result of input errors.)

M310/2:

(drun-dpipe) for tee 'title' > wall

The difference between the diameter of a Tee run element and the adjacent pipe element exceeds the greater wall thickness.

output tables will be produced

('title'= CONNAME from input table CONNECT and output table T-CDATA. this message is given because the differences may not be intended and the result of input errors.)

M310/3:

Deadweight under water > above water

The deadweight specified for a submerged pipeline section exceeds the above water value in table DEADW.

M310/4:

W310/4 valid for group I pipelines

The wall thickness specified does meet the minimum wall thickness criteria for group II types of pipelines as defined in the NEN3650-2:2017 code. However, it does not meet the group I minimum wall thickness criteria.


H3104, last changed: 2/5/2020

See also:

Design function description

Input data table overview

Output data table overview

Sigma-Epsilon diagram